"I Was a Slave of the Living Hulk!", et al
November 1960
An electrician restores Xemnu, who enslaves the world
reprinted in
*
Marvel Monsters: Devil Dinosaur
("I Was a Slave..." only)
"The Battle that Time Forgot", (reprint)
December 2005
(12/2005)
Celestials orchestrate a battle between the Hulk and Devil Dinosaur